LED three-dimensional display system design
In this paper, the high-speed light-emitting characteristics of light-emitting diodes (LEDs) are used to display a three-dimensional shape by using a rotating two-dimensional light-emitting diode array as a display carrier. The paper also introduces the working principle of LED three-dimensional display system in detail, discusses the system structure, and gives the actual display effect.
The three-dimensional shape is displayed by using a rotating two-dimensional light emitting diode array as a display carrier by utilizing the high-speed light-emitting characteristics of the light-emitting diode (LED). The modulated discrete two-dimensional image information forms a depth effect due to persistence of vision, and is integrated into a continuous three-dimensional image to successfully realize three-dimensional display in the cylinder space.
introduction
The three-dimensional display is a visualization process for recording, processing and reproducing the inherent three-dimensional information of the object. At present, foreign body three-dimensional display research mainly includes laser scanning dual-infrared photon up-conversion technology, laser scanning system based on high-speed acousto-optic scanner and rotating spiral screen, spiral screen projection system using fast spatial light modulator, etc. It is more difficult and the price is more expensive. In this paper, the LED array is used to realize the three-dimensional display with individual pixels and the spatial size is in the cylinder. The working principle of the LED three-dimensional display system is introduced, the system structure is discussed, and the actual display effect is given.
LED (Light EmitTIng Diodes) display technology refers to a modern new technology that integrates optoelectronics, computer and control. It is closely integrated with traditional advertising to become a new media propaganda tool, which is widely used in information display and advertising in public places such as exhibition centers, financial markets, sports venues, airports, terminals, and stations.
1 LED three-dimensional display system principle
Studies have shown that the human eye vision persistence time is about 50-200ms, that is, human visual tracking of brightness changes will lag due to the awareness processing delay. When the actual source flicker frequency exceeds 5 Hz, the impression is a continuous illuminant rather than a scintillator. Based on the persistence characteristics of human vision, a schematic diagram of the structure of the volumetric three-dimensional display system shown in Fig. 1 is designed.
Figure 1: Schematic diagram of the system structure
When the LED array screen is rotated at a high speed under the motor drive, a cylinder space is periodically swept out, and the LEDs on the array are rotated to provide a bulk display medium dispersed in the three-dimensional space, thereby forming a virtual body pixel. For ease of understanding, we can spatially decompose it, as shown in Figure 2.
Figure 2: Spatial decomposition diagram
2(a) to 2(d) respectively show two-dimensional information displayed by the left LED array in successive unit time intervals, and black dots in the figure indicate that the LED is in a light-emitting state. Due to the persistence of vision, the observer perceives the discrete two-dimensional image sequence of Figures 2(a) - 2(d) above, but a composite spatial image as shown in Figure 2(e).
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